Thanks Phil,
Your pictures confirm the C60 chassis rails are tapering, albeit not as much on Ford chassis.
Next question: is this tapering also apparent on the CGT chassis? The picture below is well known and (to me) it seems to show straight frame rails, at least on the rear section. I recall seeing pictures of a Cab 13 CGT in Norway with straight frame rails too.
Was the CGT frame a shortened C60S or C60L frame, chopped just before the tapering started?
Or am I drawing conclusions based on wrong sightings?
Hanno